<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>更新时的一个问题</title>
     <!-- 引入vue -->
     <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
 
    <div id="root">
         <!-- 遍历数组 -->
        <h2>人员列表</h2>
        <button @click="updateMei">更新马冬梅信息</button>
        <ul>
        <!-- v-for可以遍历 -->
            <li v-for="(p,index) of personArr" :key="p.id">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul>
       
    </div>
    
</body>
<script type="text/javascript">
    Vue.config.productionTip = false //阻止vue在启动生成生产提示。
    //用计算属性实现
    const vm = new Vue({
        el:'#root',
        data:{
            personArr:[
                {id:'001',name:'马冬梅',age:34,sex:'女'},
                {id:'002',name:'周冬梅',age:80,sex:'女'},
                {id:'003',name:'周杰伦',age:40,sex:'男'},
                {id:'004',name:'温兆伦',age:23,sex:'男'},
            ],
            
        },
        methods:{
            updateMei(){
                // this.personArr[0].name='马老师'//奏效
                // this.personArr[0].age=50//奏效
                // this.personArr[0].sex='男'//奏效

                this.personArr[0] =  {id:'001',name:'马老师',age:50,sex:'男'}
            }
        }
    })
    </script>
</html>